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C. L. HEISLER.

SAFETY FEED FOR PRESSES.

APPLICATION FILED JAN.24, 1916.

1 1 95, 987, Patented Aug. 29, 1916.

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C. L. HEISLER.

SAFETY FEED FOR PRESSES.

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CHARLES L. HEISLER, 0F SGHENECTADY, NEW YORK.

SAFETY-FEED FOR PRESSES.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Application filed January 24, 1916. Serial No. 74,032.

To all whom it may concern:

Be it known that I, CHARLES L. HEIsLER, a resident of Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Safety-Feeds for Presses, of which improvement the following is a specification.

My invention relates more particularly to automatic means for safely feeding powder molds into a press fitted with weighing means for accurately indicating the pressure applied to the powder molds. Its object is to provide a simple and effective mechanism which will prevent a powder mold from being carried under a pressure applying member until it is properly assembled, thereby avoiding dangerous and destructive explosions; which will hold the mold stationary while pressure is being applied; which, after such application of pressure, will safely and automatically deliver the mold outside of a guard and permit it to remain there stationary until unloaded and again properly reloaded and assembled with the operators hands in a safe position for repeating the pressing operation; which will automatically replace a guard before the mold is placed under the pressure applying means, thereby preventing injury from explosion; and which will increase the capacity of the press and remove the fear from danger continually experienced by an operator when hand feeding a press.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure 1 is an end elevation showing the appli cation of my invention to a powder press, portions of which are broken away for purpose of illustration; Fig. 2, a side elevation thereof; Fig. 3, an enlarged detail plan view of a powder mold carrier; Fig. 4, a sectional elevation thereof; Fig. 5, an end view; Fig. 6, a side view, in elevation, of portions of the carrier, and coupler member, and of a carrier coupling, with a portion of the platen in section, and Fig. 7, an end view of the coupler member and transverse section through the carrier guide.

In the several drawings the numeral 1, indicates a powder press of usual construction to which my safety feeding device has been applied. The reciprocating member 2,

is actuated by the vertically disposed pair of rods 3, which are coupled to an eccentric shaft 3 disposed horizontally in the base of the machine. The shaft is driven by a train of gears coupled to a motor, which being of usual construction is not shown. The amount of pressure transmitted to a powder mold 4c, is adjusted by a screw 5, supported in the member 2. A horizontally disposed weighing platen 6 is mounted upon weighing beams 6 in usual manner, and provides a support for the powder mold which rests and is traversed upon a horizontally disposed carrier guide or bearings 6 formed upon the platen. By means of the carrier 7, the mold is moved from the outer or loading position, shown dotted in Fig. 1, into axial alinement with and under the screw 5. The mold is held stationary under the screw for a short period of time, sufficient to complete the pressing operation, after which it is returned to the outer or loading position and automatically deposited, remaining there until unloaded and reloaded. The operator manually actuates, with both hands, a pair of carrier coupling, or trip, latches 8, when it is desired to repeat the powder pressing operation, as will be described hereinafter.

Since the slight motion of the weighing platen is vertical, it is necessary to transmit power to reciprocate the mold carrier in a horizontal direction thereto by the coupler member 9, and at right angles to the motion of the platen for the purpose of avoiding error in the reading of the pressure applied vertically to the powder mold. An oscillating cam lever 10, is pivoted at its two lower ends on the base bracket 11; to the member 9, at its upper end, by the pin 10", and is coupled near its middle by the cam roller 12, to the groove 13, of the cam 13. This cam is rigidly fastened to the rear end of the eccentric shaft 3 by means of the bolts 13", and is formed to give proper timing and motion to the carrier and mold. Springs 9*, mounted upon the coupler member on opposite sides of the swivel 9, com pensate for slight imperfections in the timing of the cam 13, and prevent sudden applications of force therefrom to the carrier and mold.

To avoid accidents when for some unforeseen reason the carrier is obstructed, a safety trip 10*, is formed on the cam lever 10, which is made in two sections. The yoked section 10 is also pivoted at its'lower ends to the bracket 11, by the pin 11 and embraces the cam as illustrated, being coupled thereto by the roller 12, and to the cam lever 10, by the safety trip or puppet 10 A spring 10 supported in a bracket 10, formed on the lever 10 causes the puppet 10 to engage with the notch 10 formed on a projection 10*, of the yoked section 10 until an excessive force causes it to release and permit the yoked section to oscillate while the lever 10, and the mold carrier are held stationary by any obstruction; thereby, avoiding destruction of the mechanism and possible injury to an operator.

For safety from explosions of the powder mold, the reciprocating member 2, is inclosed by a sheet metal chamber 14, which is open at its front and top sides, and is supported on the weighing platen in usual manner. A guard 14*, is made to automatically open and close the front side of the chamber in a manner to completely inclose the carrier and mold while pressure is being applied thereto, thereby safe guarding the operator from explosions of the mold. This guard is automatically lifted, as the carrier passes outward to its loading position, by means of an elbow lever 15, pivoted to the chamber wall at 15, and coupled by a link 16, to the guard 14, as illustrated. A roller 17, pivoted on the vertically reciprocating member 2, transmits motion therefrom to the elbow lever in a manner to give proper timing and vertical motion to the guard 14.

The carrier frame 7, is provided with V bearings 7 that slidingly engage with corresponding bearings 6 formed on the platen 6. It is of approximately rectangular form, and embraces an ordinary powder mold A, which is shown to be of usual cylindrical exterior form as commonly used for loading fuse powder trains, and therefore, not shown in detail. A coupler hook, or latch 7, is pivoted at 7 on the carrier frame in a manner to permit it to swing freely and engage with the coupler notch 9 formed in the member 9. The shoes 7 formed on the hook 7 ride upon the wedge ends 8 formed on the latches S, and lift the hook free from the notch, thereby permitting the member 9 to freely reciprocate while the carrier remains in its loading position. The coupler member 9, is also provided with V bearings 9*, to lead its notched end into proper engagement with the carrier coupler hook. When it is desired to couple the carrier to the member 9, the trip latches 8, are pressed at their outer ends against the resistance of the spring 8 which causes a pivoted movement about the pins 8 and a spreading of their wedge ends sufficient to free the shoes 7 and drop the hook, thereby causing it to automatically engage the notch 9, and couple the carrier with the coupler member 9.

What I claim is 1. The combination, in a powder press, of a reciprocating member; a guard shielding said member; means for weighing pressure applied to a powder mold by said member; a reciprocating mold carrier interposed between said reciprocating member and the weighing means; means for operating the reciprocating member; means for reciprocating the carrier; automatic means for opening and closing the guard to prevent injury to an operator from an explosion in the mold; and connections through which said automatic means is operated by the reciprocating member.

2. The combination, in a powder press, of a reciprocating member; means for actuating said member; means for weighing pressure applied to a powder mold by said member; a mold carrier interposed between said reciprocating member and the weighing means; a rotative cam interposed between the actuating means and the carrier, and adapted to automatically insert and remove the carrier and mold from between the reciprocating member and weighing means; and an oscillating cam lever coupled to the carrier and actuated by the cam.

3. The combination, in a powder press, of a reciprocating member; means for actuating said member; means for weighing pres sure applied to a powder mold by said member; a reciprocating mold carrier interposed between said reciprocating member and the weighing means; means for reciprocating the carrier from the actuating means, including a rotative cam interposed between said actuating means and the carrier; a pivotally mounted cam lever actuated by the cam; and means for coupling the lever to the carrier.

4. The combination, in a powder press, of a reciprocating member; means for actuating said member; means for weighing pres sure applied to a powder mold by said member; a reciprocating mold carrier interposed between said reciprocating member and the weighing means; means for reciprocating the carrier from the actuating means, including a rotative cam interposed between said actuating means and the carrier; a pivotally mounted cam lever actuated by the cam; a safety trip on the cam lever; means for coupling said trip to the cam and carrier; and manually operable means for normally uncoupling the carrier and its reciprocating means.

5. The combination, in a powder press, of a reciprocating member; means for actuating said member; means for weighing pressure applied to a powder mold by said member; a reciprocating mold carrier interposed between said reciprocating member and the weighing means; a horizontally reciprocating coupler member disposed above the weighing means; means for transmitting motion thereto from the actuating means; and a. coupler for attaching it to the carrier.

6. The combination, in a powder press, of a reciprocating member; means for actuating said member and for weighing pressure applied thereby to a powder mold; a mold carrier interposed between said reciprocating member and the weighing means; means for operating the reciprocating member; means for reciprocating the carrier; and automatic means for stopping the reciprocation of the carrier at the outer end of its stroke for the purpose of removing and inserting a powder mold.

7 The combination, in a powder press, of a reciprocating member; means for actuating said member and for weighing pressure applied thereby to a powder mold; a mold carrier interposed between said reciprocating member and the weighing means; means for operating the reciprocating member; means for reciprocating the carrier; a coupling adapted to connect the carrier and the reciprocating means; and manually operable means for normally uncoupling the carrier and the reciprocating means.

8. The combination, in a powder press, of a reciprocating member; means for actuating said member and for weighing pressure applied thereby to a powder mold; a mold carrier interposed between said reciprocating member and the weighing means; means for operating the reciprocating member; means for reciprocating the carrier; a coupling adapted to connect the carrier with the reciprocating means; an automatic means, including a pair of manually operable latches, adapted to automatically disengage the coupling, for stopping the reciprocation of the carrier at the outer end of its stroke, to remove and insert a powder mold, said latches being disposed adjacent to the carrier and at some distance apart, in a manner to require,

for safety, the attachment of two hands to actuate them for reengaging the coupling and starting the carrier.

9. The combination, in a powder press, of a reciprocating member; means for actuating said member and for weighing pressure applied thereby to a powder mold; a mold carrier interposed between said reciprocating member and the weighing means; means for operating the reciprocating member; means for reciprocating the carrier; means for coupling the carrier thereto; automatic means for stopping and starting the reciprocation of the carrier at the outer end of its stroke for the purpose of removing and inserting a powder mold, including a pair of manually operable latches disposed adjacent to the carrier and at some distance from each other, and a spring adapted to hold the latches in position to uncouple the carrier when the latter is in its outer or loading position.

10. The combination, in a powder press, of a reciprocating member; means for actuating said member; means, including a horizontally disposed and vertically movable weighing platen, adapted to weigh the pressure applied to a powder mold by said reciprocating member; a reciprocating mold carrier; and connecting means for coupling and transmitting force to the carrier from the actuating means in a direction at right angles to the motion of the weighing platen.

11. The combination, in a powder press, of a reciprocating member; an eccentric shaft for operating said reciprocating member; means for actuating said shaft; means for weighing the pressure applied from said shaft to a powder mold; a reciprocating mold carrier; a rotative cam fixed to the eccentric shaft, and means for coupling said cam to the carrier.

CHARLES L. HEISLER.

Witnesses:

E. R. FINEGAN, H. R. HARRISON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ratents, Washington, D. G. 

